[RFC PATCH] of: base: add support to get machine model name

[Arnd Bergmann]

On Thursday, November 17, 2016 11:50:50 AM CET Sudeep Holla wrote:
> Currently platforms/drivers needing to get the machine model name are
> replicating the same snippet of code. In some case, the OF reference
> counting is either missing or incorrect.
> 
> This patch adds support to read the machine model name either using
> the "model" or the "compatible" property in the device tree root node.
> 
> Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>

I like the idea. One small comment:

> +int of_machine_get_model_name(const char **model)
> +{
> +	int error;
> +	struct device_node *root;
> +
> +	root = of_find_node_by_path("/");
> +	if (!root)
> +		return -EINVAL;

The global of_root variable points ot this already, and is defined
in the same file, so I think we can just skip the lookup.

	Arnd